The radius of the base and height of a cone are 5 cm and 12 cm then its slant height

The C.S.A of a cone whose d = 7 cm, $l=4l=4$ cm

The T.S.A of a cone whose d = 14 cm, h = 24 cm

Volume of a cone whose base radius is 4.2 cm and height is 4 cm

Surface area of a sphere is

Volume of a sphere is

Surface area of a hemisphere is

The volume of a sphere whose radius is 7 cm

The total surface area of a hemisphere whose radius is 14 cm

Which of the following is not a 3-D object?